Method for improving friction reduction and wear resistance of matrix

A technology of wear resistance and matrix, applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems of difficult diffusion and easy wear, achieve low friction coefficient, improve bonding force, and improve work efficiency The effect of longevity

Pending Publication Date: 2022-04-26
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

Ion sulfurizing is a new technology of sulfurizing independently developed in my country. It is an in-situ synthesis process. It is known as a "green" sulfurizing technology because of energy saving and pollution-free. It can realize low-temperature sulfurizing; but the radius of sulfur atoms is relatively large , it is difficult to diffuse in the metal, so the sulfurized layer is generally thin, so it is prone to wear in service, and its anti-friction effect and service life still need to be further improved

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  • Method for improving friction reduction and wear resistance of matrix
  • Method for improving friction reduction and wear resistance of matrix
  • Method for improving friction reduction and wear resistance of matrix

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preparation example Construction

[0039] The CoCrFeNiMo high-entropy alloy powder used in the present invention is prepared by the following method: mix the gas-atomized powder CoCrFeNi and the elemental powder Mo evenly at a molar ratio of 1:1, dry and dehumidify at 120°C to obtain CoCrFeNiMo High entropy alloy powder.

[0040] The SD-Ni45 cermet powder that the present invention adopts, its diameter is 48~100 μ m, and powder chemical composition is as shown in table 1:

[0041] Table 1 Chemical composition of SD-Ni45 alloy powder (mass fraction, %)

[0042]

[0043] The substrate used in the present invention is Q235 steel (about 100mm×50mm×10mm in size), and the surface needs to be polished with a grinder to remove scale before laser cladding.

[0044] The laser cladding of the present invention is carried out in a HWF60 composite welding robot workstation under argon protection. The laser output from the IPG YLS-6000 fiber laser is transmitted through the optical fiber to the rectangular spot cladding...

Embodiment 1

[0052] The preparation of micro-textured ion sulfurized CoCrFeNiMo high-entropy alloy cladding layer, the steps are as follows:

[0053] (1) Laser cladding

[0054] The CoCrFeNiMo high-entropy alloy powder is evenly laid on the surface of Q235 steel with a thickness of 2mm for laser cladding. The laser cladding conditions are: laser power 1800W, cladding speed 300mm / min, lap rate 30%, spot size 10mm×1mm , Shielding gas 4L / min, every cladding layer, spread another layer of powder on the overlapping part, and finally form a cladding layer with a thickness of about 1mm. After the cladding layer sample is air-cooled to room temperature, use a grinder to remove impurities such as surface oxide slag.

[0055] Carry out colored penetrant inspection on cladding layer samples, such as figure 2 As shown, the CoCrFeNiMo high-entropy alloy powder is formed well after cladding, and it is detected by a flaw detector, and there is no red color reaction, indicating that the cladding layer ...

Embodiment 2

[0065] The preparation of micro-textured ion sulfurized SD-Ni45 cermet cladding layer, the steps are as follows:

[0066] (1) Laser cladding

[0067] Put the dried SD-Ni45 cermet powder in the powder feeder, and evenly send it to the surface of Q235 steel through the front powder feed nozzle for laser cladding. The laser cladding conditions are: laser power 2500W, cladding speed 200mm / min, overlapping rate 30%, spot size 10mm×1mm, shielding gas 5L / min, powder feeding rate 20g / min, powder feeding gas 11L / min, and finally form a cladding layer with a thickness of about 1mm. After the cladding layer sample is air-cooled to room temperature, use a grinder to remove impurities such as surface oxide slag.

[0068] Carry out colored penetrant inspection on cladding layer samples, such as Figure 10 As shown, the SD-Ni45 cermet cladding layer is well formed, and it is detected by a flaw detector, and there is no red color reaction, indicating that the cladding layer has no cracks a...

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Abstract

The invention discloses a method for improving friction reduction and wear resistance of a base body, and belongs to the technical field of friction and wear. According to the method, alloy powder is cladded on the surface of a base body to form a cladding layer, then the cladding layer is subjected to texturing and sulfurizing treatment in sequence, and a textured ion sulfurizing cladding layer with antifriction and wear-resisting properties is formed on the surface of the base body, so that the antifriction and wear-resisting properties of the base body are improved, the use efficiency of the base body is improved, and the service life of the base body is prolonged.

Description

technical field [0001] The invention belongs to the technical field of friction and wear, and in particular relates to a method for improving the anti-friction and wear resistance performance of a substrate. Background technique [0002] Wear caused by friction is the main cause of failure of mechanical equipment. At present, about 80% of parts damage in the world is caused by various forms of wear. Ion sulfurizing is a new technology of sulfurizing independently developed in my country. It is an in-situ synthesis process. It is known as a "green" sulfurizing technology because of energy saving and pollution-free. It can realize low-temperature sulfurizing; but the radius of sulfur atoms is relatively large , It is difficult to diffuse in the metal, so the sulfurized layer is generally thin, so it is prone to wear in service, and its anti-friction effect and service life still need to be further improved. Therefore, seeking a more effective method of reducing friction and we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C23C8/08
CPCC23C24/10C23C8/08
Inventor 韩彬胡春阳孙鑫豪李美艳王稼林贾晨昕李学达王勇
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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